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Earnings Per Share (Tables)
 12 Months Ended
Dec. 31, 2016
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted
The following is a reconciliation of DTE Energy's basic and diluted income per share calculation for the years ended December 31:
 
2016
 
2015
 
2014
 
(In millions, except per share amounts)
Basic Earnings per Share
 
 
 
 
 
Net Income Attributable to DTE Energy Company
$
868

 
$
727

 
$
905

Less allocation of earnings to net restricted stock awards
(2
)
 
(2
)
 
(1
)
Net income available to common shareholders — basic
$
866

 
$
725

 
$
904

 
 
 
 
 
 
Average number of common shares outstanding
179

 
179

 
177

Basic Earnings per Common Share
$
4.84

 
$
4.05

 
$
5.11

 
 
 
 
 
 
Diluted Earnings per Share
 
 
 
 
 
Net Income Attributable to DTE Energy Company
$
868

 
$
727

 
$
905

Less allocation of earnings to net restricted stock awards
(2
)
 
(2
)
 
(1
)
Net income available to common shareholders — diluted
$
866

 
$
725

 
$
904

 
 
 
 
 
 
Average number of common shares outstanding
179

 
179

 
177

Diluted Earnings per Common Share(a)
$
4.83

 
$
4.05

 
$
5.10

_______________________________________
(a)
The 2016 Equity Units are potentially dilutive securities but were excluded from the calculation of diluted EPS for the year ended December 31, 2016, as the dilutive stock price threshold was not met.